New direct consecutive formation of spinel phase in (Fe,Co,Ni)Al2O4 composites for enhanced Pd(II) ions removal

Salleh, Nur Fatien Muhamad; Jalil, Aishah Abd.; Triwahyono, Sugeng; Ripin, Adnan; Sidik, Siti Munirah; Fatah, N.A.A.; Salamun, Nurrulhidayah; Jaafar, Nur Farhana; Hassim, Mohd Hazwan

doi:10.1016/j.jallcom.2017.08.191

Cited by 14 publications

(7 citation statements)

References 53 publications

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“…From the band intensities summarized in Figure B, it is clear that FX possesses the highest number of almost all bands, particularly for the Si–O–T asymmetric and bending modes, demonstrating its well-formed structure compared with the other HFSZ catalysts. However, the external −OH bands (at 964 cm –1 ) decreased in the following order: FB > FT > FX, further evidencing the excess formation of Si–O–T bonds in the framework of the catalysts during preparation and/or the calcination process …”

Section: Resultsmentioning

confidence: 92%

“…However, the external −OH bands (at 964 cm −1 ) decreased in the following order: FB > FT > FX, further evidencing the excess formation of Si−O−T bonds in the framework of the catalysts during preparation and/or the calcination process. 22 To investigate the hydroxyl groups, the HFSZ catalysts were evacuated at 673 K for 1 h prior to FTIR analysis to remove the physisorbed water. Figure 4C shows the IR spectra in the 3800−3400 cm −1 region.…”

Section: Obtained By Microwave Plasma Atomic Emission Spectroscopy (M...mentioning

confidence: 99%

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Altering Dendrimer Structure of Fibrous-Silica-HZSM5 for Enhanced Product Selectivity of Benzene Methylation

Jalil

Zolkifli

Triwahyono

et al. 2018

Ind. Eng. Chem. Res.

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Dendrimeric fibrous silica HZSM-5 (HFSZ) catalysts were prepared using a microemulsion technique and ZSM-5-seeding crystallization with different oil phases, benzene, toluene, and xylene, and denoted as FB, FT, and FX, respectively. The HFSZ catalysts possessed a well ordered crystalline structure with chestnut-like spherical particles, rich with dendrimeric fiber morphology. It was found that the hydrophobicity of the oil phase significantly affected the physicochemical properties of the HFSZ catalysts that altered their activity toward benzene methylation. The density of dendrimeric fibers and ensuing acidities were found to play crucial roles in enhancing the selective production of toluene and p-xylene via transalkylation and dealkylation of bulkier aromatics. The production of ethylbenzene (EB) using commercial HZSM-5 could be suppressed to give major products of toluene (84%) and p-xylene (58%) when using FB and FX at 673 and 623 K, respectively.

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Section: Resultsmentioning

confidence: 92%

Section: Obtained By Microwave Plasma Atomic Emission Spectroscopy (M...mentioning

confidence: 99%

Altering Dendrimer Structure of Fibrous-Silica-HZSM5 for Enhanced Product Selectivity of Benzene Methylation

Jalil

Zolkifli

Triwahyono

et al. 2018

Ind. Eng. Chem. Res.

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“…The positive values of ∆H° (+ 13.7455 kJ/mol) and ∆S° (+ 57.0041 J/mol) indicated the endothermic process and randomness increment at a solid-solute interface with certain structural alternations in adsorbent and adsorbate [35]. The decreasing ∆G° values with increasing temperature indicates that the removal of MB onto CS-BP is feasible, spontaneous and increase in the degree of spontaneity at a higher temperature.…”

Section: Thermodynamic Studymentioning

confidence: 96%

Methylene Blue Adsorption onto Cockle Shells-Treated Banana Pith: Optimization, Isotherm, Kinetic, and Thermodynamic Studies

et al. 2020

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Two low-cost wastes, banana pith (BP) and cockle shells (CS) were explored towards methylene blue (MB) removal. The performance of cockle shells-treated banana pith (CS-BP) in MB removal was compared with untreated BP and commercially Ca(OH)2-treated BP (Ca(OH)2-BP). The adsorption efficacy was following the order of BP < CS-BP < Ca(OH)2-BP, indicating the positive role of alkaline treatment towards MB removal and great potential of CS as a low-cost activation material. The optimization of MB removal onto CS-BP was executed by response surface methodology (RSM) with three independent variables (adsorbent dosage (X1), initial pH (X2) and initial MB concentration (X3)), and the optimal condition was achieved at X1 = 1.17 g/L, X2 = pH 7 and X3 = 214 mg/L, with 87.32% of predicted MB removal. The experimental data wellfitted the pseudo-second-order kinetic (R 2 > 0.99) and the Langmuir isotherm (R 2 = 0.999) models, demonstrating the chemisorption and naturally homogeneous process. Thermodynamics study discovered that the MB removal by CS-BP is endothermic, feasible, spontaneous and randomness growth at a solid-solute interface. It is affirmed that CS could be employed as a low-cost activation material and CS-BP as a low-cost adsorbent.

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“…Then it was dried at 70 0 C. The material was ground and sieved through the sieves of 300μ sizes. The material was put in a container that kept air out so it could be used again [23]. The acid-treated OPEFB pellets were stir vigorously with concentrated HCl acid for 12 hours.…”

Section: Preparation Of Opefb Pelletsmentioning

confidence: 99%

Oil Palm Empty Fruit Bunch (OPEFB) Pellets as a Biosorbent for Ni (II) and Cr (VI) removal in an aqueous solution

Salleh

Ghafar

Shukri

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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This study was carried out to examine the ability of adsorbent oil palm empty fruit bunch (OPEFB) pellet to remove Ni (II) and Cr (VI) in an aqueous solution. Raw OPEFB pellet and acid-treated OPEFB pellet were utilised as adsorbents. The constitution of OPEFB pellets that consisted of functional hydroxyl groups was proven by FT-IR results confirming its ability to adsorb Ni (II) and Cr (VI) ions. For the removal of Ni (II), the percent removal of Ni (II) was found to be better by using raw OPEFB pellets but the removal of Cr (VI) was found to be better by using acid-treated OPEFB pellets. The optimum conditions for Ni (II) removal were at pH 5, 10 mg/L of initial concentration, 2.0 g of pellets had removed 76% of Ni(II) within 90 min. The optimum conditions for Cr (VI) removal were at pH 7, 10 mg/L of initial concentration, 3.0 g of pellets had removed 63% of Cr (VI) within 120 min. Hence it was proved that oil palm empty fruit bunch pellet could successfully adsorb Ni (II) and Cr (VI) in an aqueous solution.

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New direct consecutive formation of spinel phase in (Fe,Co,Ni)Al2O4 composites for enhanced Pd(II) ions removal

Cited by 14 publications

References 53 publications

Altering Dendrimer Structure of Fibrous-Silica-HZSM5 for Enhanced Product Selectivity of Benzene Methylation

Altering Dendrimer Structure of Fibrous-Silica-HZSM5 for Enhanced Product Selectivity of Benzene Methylation

Methylene Blue Adsorption onto Cockle Shells-Treated Banana Pith: Optimization, Isotherm, Kinetic, and Thermodynamic Studies

Oil Palm Empty Fruit Bunch (OPEFB) Pellets as a Biosorbent for Ni (II) and Cr (VI) removal in an aqueous solution

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